I remember being told that, if an umpire ever called time in the middle of a pitcher's windup, it's best for the pitcher to follow through with the pitch since hard-stopping the motion could lead to injury.

I remember being told that every time it happens. Announcers say the same thing whenever it happens (and they also said it after the Valverde incident above, where time wasn't called), but no one I've talked to seems to remember an actual example of a pitcher getting hurt by notfollowing through.

Wait, pitchers can do this with no consequence if no one is on base?! Why in the hell don't more pitchers do this then? What a great way to psyche out a batter! If the only barrier is the myth about being injured, then, please, let's debunk that and get moving with some #weirdbaseball.